Father and Uncle are sons-heirs of Lolo who has an untitled residential lot, with house, located in Taguig. The two divided the lot and house between themselves when Lolo died. In 1994, Uncle sangla (is it "mortgaged" in legal parlance?) his share of the lot, with his half of the house to Mrs.A for P20,000. When Uncle died, his wife Tita offered the mortgaged lot and half-house, to Father, but Father could not buy it. So the Tita sold it to Mrs.A for additional P50,000. Uncle and Tita have a Daughter, who was only 4 to 5 years old when it was sold to Mrs.A. In 1998, Mrs.A sold the lot for P250,000 to Stranger, who has been occupying the lot and half of the house until now.
1. Did Tita have the right to sell the lot, considering that it was still untitled and there is a compulsary heir Daughter? Was the sale valid? If not, what are the legal remedies?
2. Was the sale between Mrs.A and Stranger valid? If not, who may contest it?
3. Pwede po ba maghabol si Daughter, who is now 19 years old?
4. Do the Wife and Sons of Father (now deceased) have right/interest over the lot and the half of the house in question? Can they buy back the lot and house?